MATLAB: How to add Filename to all variables automatically

Question

Hi, everyone I have 127 variable in a .mat file. I want to add filename to all variables and save them a path like "File\Filename_VariableX" automatically. Thanks a lot.

Answer 1

Assuming you want to process a whole directory like this:

projectdir = 'File';   %location to save into
if ~exist(projectdir, 'dir'); mkdir(projectdir); end
dinfo = dir('*.mat');
for fidx = 1 : length(dinfo)
  filename = dinfo(fidx).name;
  [~, basename] = fileparts(filename);
  datastruct = load(filename);
  fn = fieldnames(datastruct);
  for nidx = 1 : length(fn)
    varname = fn{nidx};
    outvarname = [basename '_' varname];
    outfilename = fullfile(projectdir, [outvarname '.mat']);
    outstruct = struct( outvarname, datastruct.(varname) );
    save(outfilename, '-struct', outstruct);
  end
end

This preserves variable names inside the .mat files.